diff --git a/lib/build.js b/lib/build.js
index f151736..b842952 100644
--- a/lib/build.js
+++ b/lib/build.js
@@ -6,7 +6,8 @@ const browserify       = require('browserify');
 const watchify         = require('watchify');
 const fs               = require('fs');
 const path             = require('path');
-const UglifyJS         = require('uglify-js');
+// const UglifyJS         = require('uglify-js');
+const Terser           = require('terser');
 const jscrambler       = require('jscrambler').default;
 const bowerrcFile      = path.resolve('.bowerrc');
 const factor           = require('factor-bundle');
@@ -111,6 +112,7 @@ module.exports = function(type, unit, watcher, options, done) {
 		case 'dist':
 			debug = false;
 			configs.env = 'production';
+			break;
 		case 'dev':
 			debug = true;
 			configs.env = 'development';
@@ -334,7 +336,6 @@ module.exports = function(type, unit, watcher, options, done) {
 							waterfall([
 								// Minify commons components
 								function (next) {
-
 									minify(
 										outputCommonsJsFile,
 										_.extend({optimize: true},uglifyOptions),
@@ -377,7 +378,9 @@ module.exports = function(type, unit, watcher, options, done) {
 								// Remove source map files
 								function (next) {
 									for (var i = 0; i < mapFiles.length; i++) {
-										fs.unlinkSync(mapFiles[i]);
+										try {
+											fs.unlinkSync(mapFiles[i]);
+										} catch(e) {}
 										// console.log( path.resolve(mapFiles[i]) );
 									}
 									return next();
@@ -416,7 +419,7 @@ module.exports = function(type, unit, watcher, options, done) {
 
 
 	// Function for minified
-	function minify( file, options, done ){
+	async function minify( file, options, done ){
 		if (_.isFunction(options)){
 			done = options;
 			options = {};
@@ -432,7 +435,7 @@ module.exports = function(type, unit, watcher, options, done) {
 		console.log("  minify file %s...".grey, file);
 		try {
 			var code   = fs.readFileSync( file, {encoding: 'utf8'} );
-			var minify = UglifyJS.minify( code, options );
+			var minify = await Terser.minify( code, options );
 		} catch (e) {
 			return done(  new Error(`Error on parse file ${e.filename}`) );
 		}
diff --git a/package.json b/package.json
index e4696db..247aee2 100644
--- a/package.json
+++ b/package.json
@@ -62,7 +62,7 @@
     "node-watch": "^0.6.3",
     "optimize-js": "^1.0.3",
     "realpathify": "^1.0.1",
-    "uglify-js": "^3.9.4",
+    "terser": "^5.3.3",
     "underscore": "^1.9.1",
     "underscore.string": "^3.3.5",
     "watchify": "^3.11.1"